Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/ConcurrentMarkSweepGeneration.java @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
author | coleenp |
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date | Thu, 27 Jan 2011 16:11:27 -0800 |
parents | c18cbe5936b8 |
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rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.memory; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.debugger.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 | |
33 public class ConcurrentMarkSweepGeneration extends CardGeneration { | |
34 private static AddressField cmsSpaceField; | |
35 | |
36 public ConcurrentMarkSweepGeneration(Address addr) { | |
37 super(addr); | |
38 } | |
39 | |
40 static { | |
41 VM.registerVMInitializedObserver(new Observer() { | |
42 public void update(Observable o, Object data) { | |
43 initialize(VM.getVM().getTypeDataBase()); | |
44 } | |
45 }); | |
46 } | |
47 | |
48 private static synchronized void initialize(TypeDataBase db) { | |
49 Type type = db.lookupType("ConcurrentMarkSweepGeneration"); | |
50 cmsSpaceField = type.getAddressField("_cmsSpace"); | |
51 } | |
52 | |
53 // Accessing space | |
54 public CompactibleFreeListSpace cmsSpace() { | |
55 return (CompactibleFreeListSpace) VMObjectFactory.newObject( | |
56 CompactibleFreeListSpace.class, | |
57 cmsSpaceField.getValue(addr)); | |
58 } | |
59 | |
60 public long capacity() { return cmsSpace().capacity(); } | |
61 public long used() { return cmsSpace().used(); } | |
62 public long free() { return cmsSpace().free(); } | |
63 public long contiguousAvailable() { throw new RuntimeException("not yet implemented"); } | |
64 public boolean contains(Address p) { return cmsSpace().contains(p); } | |
65 public void spaceIterate(SpaceClosure blk, boolean usedOnly) { | |
66 blk.doSpace(cmsSpace()); | |
67 } | |
68 | |
69 public Generation.Name kind() { | |
70 return Generation.Name.CONCURRENT_MARK_SWEEP; | |
71 } | |
72 | |
73 public String name() { | |
74 return "concurrent mark-sweep generation"; | |
75 } | |
76 | |
77 public void printOn(PrintStream tty) { | |
78 tty.println(name()); | |
79 cmsSpace().printOn(tty); | |
80 } | |
81 } |